Table 2. Hospitalization and intensive care unit (ICU) admission among children admitted to hospital with traumatic head injury (n=594).

		Hospitalization >48 hr	ICU admission
n		307	176
AIS-HR scores	Mild–moderate (1-2)	1.0 (reference)***	1.0 (reference)***
	Serious–severe (3-4)	6.7 (4.5–10.0)	6.1 (3.8–9.9)
	Critical (5)	143 (8.6–1000)	84.9 (31.7–227)
	c statistic	0.77	0.78
GCS scores	Mild (13-15)	1.0 (reference)***	1.0 (reference)***
	Moderate (9-12)	5.9 (3.1–11.2)	11.5 (6.7–19.7)
	Severe (3-8)	66.7 (13.1–339)	127 (56.2–286)
	c statistic	0.71	0.88

Results are from logistic regression models, and data are presented as odds ratios and 95% confidence intervals according to Abbreviated Injury Scale scores for the head region (AIS-HR) and Glasgow Coma Scale (GCS) scores. ^***p<0.001 for the association of AIS-HR or GCS with the outcome measure. The c statistic corresponds to the area under the receiver operating characteristic (ROC) curve, and it varies between 0.5 and 1.0, with higher values indicating higher predictive ability.